JP2011015834A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the influence of washing water other than washing water for detecting the turbidity on the accuracy in detecting the turbidity within a washing tub.SOLUTION: The dishwasher washes objects 3 to be washed by jetting washing water. The dishwasher includes: the washing tub 2 having a storage portion 5 for storing washing water for holding the objects 3 to be washed; a fixed washing nozzle 11 fixed to the rear surface of the inner wall of the washing tub 2; and a washing pump 9 for pressure-feeding washing water to the fixed washing nozzle 11. The dishwasher further includes a first water channel extending forward from the fixed washing nozzle 11; a second water channel bending upward from the first water channel; turbidity detecting means 14 disposed on the upper surface of the inner wall of the washing tub 2 for detecting information on the turbidity of washing water to be fed from the second water channel; and a turbidity detecting water channel disposed in the turbidity detecting means 14 where the lower end disposed lower than the upper end of the second water channel. With this structure, penetration of foam into washing water from the atmosphere can be prevented, and the turbidity can be accurately detected.

Description

  The present invention relates to a dishwasher equipped with turbidity detection means for detecting the turbidity of washing water.

  The conventional dishwasher has detected the turbidity by submerging the turbidity detecting means (see, for example, Patent Document 1). FIG. 8 shows a conventional dishwasher described in Patent Document 1.

  As shown in FIG. 8, the dishwasher main body 101 has a washing tank 102, and supplies water or hot water into the washing tank 102 through a water supply port 103. A drainage port 104 is provided at the bottom of the water reservoir, and a cleaning pump 105 connected to the drainage port 104 and driven by a motor is attached, and the cleaning pump 105 supplies cleaning water into the cleaning tank 102 for circulation. is doing. A turbidity detecting means 106 for detecting the degree of contamination of the washing water is provided in the washing tank 102. The turbidity detecting means 106 has a light emitting part 107 and a light receiving part 108. The light emitting part 107 and the light receiving part 108 are supplied with water. It was disposed at a position lower than the position of the port 103 and higher than the position of the drain port 104.

JP 2006-61218 A

  However, in such a conventional configuration, since the turbidity detection means is provided at a position lower than the cleaning water level accumulated in the cleaning tank, when the cleaning water is drained or when the water level fluctuates due to the driving of the cleaning pump, etc. In this case, oil stains floating on the water surface were attached to the surface of the turbidity detecting means. In particular, oil stains and the like cannot be sufficiently removed simply by supplying clean water, so that it is difficult to keep the turbidity detecting means clean, which causes an error in turbidity detection.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a dishwasher that can suppress contamination of the turbidity detecting means and further suppress occurrence of errors in turbidity detection.

  A dishwasher according to the present invention is a dishwasher that jets wash water to wash an object to be cleaned, and has a storage part for storing the wash water, and a washing tank for storing the object to be washed, A fixed cleaning nozzle fixed to the rear surface of the inner wall; a cleaning pump for pumping cleaning water to the fixed cleaning nozzle; a first water channel extending forward from the fixed cleaning nozzle; and bending upward from the first water channel The turbidity detecting means provided on the upper surface of the inner wall of the cleaning tank and the turbidity detecting means for detecting information on the turbidity of the cleaning water supplied from the second water passage, Is provided with a turbidity detection water channel provided below the upper end of the second water channel.

Here, since the turbidity detecting means is provided on the upper surface of the inner wall of the cleaning tank, adhesion of oil stains floating on the surface of the cleaning water is reduced. Therefore, the detection error of the turbidity of the washing water is reduced, and the turbidity of the washing water can be accurately detected over a long period. Moreover, since the washing water for detecting turbidity is supplied to the turbidity detecting means without coming into contact with the air, it is possible to prevent bubbles from entering the washing water from the air. Turbidity detection errors can be suppressed.

  According to the dishwasher of the present invention, the contamination of the turbidity detecting means is suppressed and the turbidity detecting washing water is supplied to the turbidity detecting means without coming into contact with air, so that bubbles are generated from the air into the washing water. Intrusion can be suppressed.

Schematic sectional view of the dishwasher according to the first embodiment of the present invention viewed from the front The cross-sectional schematic which looked at the dishwasher of 1st Example of this invention from the side Enlarged perspective view of the turbidity detection means of the dishwasher Side sectional view of the turbidity detection means of the dishwasher Enlarged front view near the turbidity detection means of the dishwasher (A) First side view showing the process of fixing the fixed washing nozzle of the dishwasher to the washing tub (b) Second side view showing the process of fixing the fixed washing nozzle of the dishwasher to the washing tub (c) ) Third side view showing the process of fixing the fixed washing nozzle of the dishwasher to the washing tank (A) First front view showing the process of fixing the fixed washing nozzle of the dishwasher to the washing tub (b) Second front view showing the process of fixing the fixed washing nozzle of the dishwasher to the washing tub (c) ) Third front view showing the process of fixing the fixed washing nozzle of the dishwasher to the washing tank Cross-sectional view of a conventional dishwasher

  1st invention is a dishwasher which injects washing water and wash | cleans a to-be-washed object, Comprising: It has a storage part which stores washing water, The washing tank which accommodates a to-be-washed object, The inner wall rear surface of a washing tank A fixed cleaning nozzle fixed to the fixed cleaning nozzle, and a cleaning pump for pumping cleaning water to the fixed cleaning nozzle, and a first water channel extending forward from the fixed cleaning nozzle, bent upward from the first water channel A turbidity detecting means for detecting information on the turbidity of the cleaning water supplied from the second water channel and the inner wall of the cleaning tank and supplied from the second water channel; The dishwasher is provided with a turbidity detection water channel provided below the upper end of the second water channel. With this configuration, the adhesion of oil stains floating on the surface of the cleaning water is reduced. Therefore, the detection error of the turbidity of the washing water is reduced, and the turbidity of the washing water can be accurately detected over a long period. In addition, since the washing water is supplied to the turbidity detecting means without coming into contact with the air, it is possible to prevent bubbles from entering the washing water from the air. Errors can be suppressed.

  A second invention is a dishwasher according to the first invention, in particular, a dishwasher provided with a position restricting portion for fixing the fixed washing nozzle at a predetermined position of the washing tank. Further, it is possible to suppress a decrease in accuracy due to component variations and assembly variations that occur during manufacturing, and turbidity can be detected with high accuracy. There is no need to consider the gap relationship between the outlet of the cleaning nozzle and the inlet of the concave portion due to component variations and assembly variations that occur in manufacturing, and stable turbidity detection including variations due to manufacturing can be realized.

(Embodiment 1)
Hereinafter, a dishwasher according to an embodiment of the present invention will be described with reference to the drawings. In the following description, a liquid used for cleaning and rinsing an object to be cleaned such as tableware is referred to as cleaning water.

1 and 2 are a schematic cross-sectional view of the dishwasher according to the first embodiment of the present invention viewed from the front and a schematic cross-sectional view viewed from the side. The left direction in FIG. 2 is the front of the aircraft, and the right direction is the rear of the aircraft. 3 and 4 are an enlarged perspective view and a sectional view of the turbidity detecting means of the dishwasher, and FIG. 5 is a sectional view of the switching valve of the dishwasher in the first embodiment.

  As shown in FIGS. 1 and 2, a washing tub 2 is provided inside a main body 1 of the dishwasher, and an inner wall of the washing tub 2 is formed of a resin material. Inside the washing tub 2, a table basket 4 in which an object to be cleaned 3 such as tableware is installed is stored so as to be able to be taken in and out in the horizontal direction from the washing tub 2.

  A storage portion 5 for storing cleaning water is provided at the bottom of the inner surface of the cleaning tank 2, and a cleaning water circulation path 7 that communicates with the cleaning means 6 is provided at the bottom of the main body 1. In the washing water circulation path 7, in order from the water storage section 5 to the washing means 6, a residue filter 8 that filters washing water and removes leftovers in the washing water, a washing pump 9 that pressurizes and pumps washing water, and supply of washing water Water distribution means 10 for switching the route is provided. Here, leftovers refer to foods and solids that have adhered to the object to be cleaned.

  The cleaning means 6 having a plurality of injection ports is provided on the inner wall of the bottom surface of the cleaning tank 2 and is provided on the inner wall of the rear surface of the cleaning tank 2 and the first rotating nozzle 6a and the second rotating nozzle 6b that are rotatably supported. The fixed cleaning nozzle 11 is provided.

  A turbidity detecting means 14 for detecting the turbidity of the cleaning water is provided on the inner wall of the upper surface of the cleaning tank 2 and has a light emitting unit 12 and a light receiving unit 13. The turbidity detecting means 14 is provided at a position higher than the water level in the cleaning tank 2 and does not submerge, so that it is not contaminated by oil accumulated on the surface of the cleaning water in the water storage section 5 and turbidity. Contamination of the detection means 14 can be suppressed, and the occurrence of turbidity detection errors can be suppressed.

  Further, when the light emitting unit 12 and the light receiving unit 13 are fixed to the inner wall of the upper surface of the cleaning tank 2, the light emitting unit 12 and the light receiving unit 13 can be combined and fixed with only one seal member. As compared with the case where the light emitting unit 12 and the light receiving unit 13 are fixed by the respective sealing members in the middle of the cleaning water, the washing water is more difficult to leak. Further, when the turbidity detecting means 14 and the light emitting unit 12 and the light receiving unit 13 are fixed to the inner wall of the upper surface of the cleaning tank 2, the possibility that the cleaning water leaks upward is lower than the possibility that the cleaning water leaks downward. Water leakage damage can be reduced even when there are problems such as poor sealing.

  A first water channel 45 extending forward from the fixed cleaning nozzle 11 and a second water channel 46 bent upward from the first water channel 45 are provided. Moreover, the opening at the upper end of the second water channel 46 is the turbidity detection outlet 15.

  Further, the turbidity detection injection port 15 supplies cleaning water to a turbidity detection water channel 47 in which the light emitting unit 12 and the light receiving unit 13 are arranged on the outer wall. The opening at the lower end of the turbidity detection water channel 47 is provided so as to extend below the upper end of the second water channel 46, that is, the turbidity detection injection port 15. A part of the upper stage of the water channel 46 is inserted. Therefore, since the washing water for detecting turbidity is supplied from the fixed washing nozzle 11 to the turbidity detecting means 14 without touching the air, the washing water in which mixing of bubbles is suppressed is supplied to the turbidity detecting means 14. Can do. Since the turbidity detection means 14 is provided in the injection direction of the turbidity detection outlet 15, cleaning water is reliably supplied to the turbidity detection means 14. Thus, even if the turbidity detecting means 14 is provided on the inner wall of the cleaning tank 2, the turbidity can be reliably detected with high accuracy.

Further, the turbidity detection means 14 detects the turbidity of the cleaning water jetted substantially upward from the turbidity detection injection port 15 provided in the fixed cleaning nozzle 11, thereby causing the light emitting unit 12, the light receiving unit 13, and Since an air layer is less likely to be generated during this period, the accuracy of turbidity detection can be further improved. That is, when the turbidity detecting unit 14 is provided on the inner wall of the cleaning tank 2 and the cleaning water is sprayed in the horizontal direction with respect to the turbidity detecting unit 14, the light emitting unit 12 and the light receiving unit 13 are caused by fluctuations in the supply amount of the cleaning water. There is a case where an air layer is generated between the two, and as a result, a problem that the error of turbidity increases occurs. However, the occurrence of the problem can be suppressed by adopting the above configuration.

  The turbidity detection unit 42 has a light-transmitting side wall, and the optical sensor includes a light-emitting unit 12 that generates light and a light-receiving unit 13 that receives light. The light-emitting unit 12 and the light-receiving unit 13 are front surfaces. The cross-sectional views are arranged so as to face each other outside the mutually opposite side wall portions of the concave turbidity detection water channel 47.

  In this case, in the turbidity detection means 14, the light generated from the light emitting unit 12 is received by the light receiving unit 13 through the side wall portions of the concave portion facing each other and the cleaning water in the concave portion. Thereby, the turbidity of washing water is detected. In this way, it is possible to detect the turbidity of the washing water with a simple configuration. Further, the light emitting unit 12 and the light receiving unit 13 are located outside the side wall of the concave portion. Thereby, it is possible to easily and reliably prevent the cleaning water from coming into contact with the light emitting unit 12 and the light receiving unit 13.

  The fixed cleaning nozzle 11 is disposed so as to discharge cleaning water upward from the discharge port, and the turbidity detection water channel 47 is disposed downward so that the upper surface faces the turbidity detection injection port 15. When cleaning water is supplied to the fixed cleaning nozzle 11, the cleaning water discharged from the turbidity detection injection port 15 collides with the upper surface of the concave portion and is returned to the turbidity detection injection port 15. On the other hand, when the cleaning water is supplied to one cleaning nozzle other than the fixed cleaning nozzle 11, the cleaning water is not discharged from the turbidity detection injection port 15. Therefore, the wash water in the turbidity detection water channel 47 arranged downward is easily and reliably removed. Thereby, it is possible to easily and reliably prevent dirt from adhering to the inner surface of the turbidity detection water channel 47. Accordingly, it is possible to prevent the detection accuracy of the turbidity of the cleaning water by the optical sensor from decreasing.

  Wash water is discharged upward from the turbidity detection spray port 15, and the wash water is accurately placed in the concave portion of the turbidity detection water channel 47 disposed so that the bottom surface faces the turbidity detection spray port 15. In order to supply, a concave insertion portion 40 is formed in the fixed cleaning nozzle 11. The inserted portion 40 has a groove portion into which the insertion rib 41 is inserted, and an arc-shaped convex portion is formed on both sides of the groove portion so that the insertion rib 41 (position restricting portion) is smoothly inserted into the groove portion. ing.

  Further, two fixed cleaning nozzle side ribs 43 are formed at the upper end portion of the fixed cleaning nozzle 11, and two cleaning tank side ribs 44 (position restricting portions) that come into contact with the fixed cleaning nozzle side rib 43 are provided in the cleaning tank. 2 is formed on the inner wall of the upper surface.

  6A to 6C and FIGS. 7A to 7C, the fixing direction of the fixed cleaning nozzle 11 is indicated by an arrow. As shown in FIGS. 6A and 7A, first, the upper end of the fixed cleaning nozzle 11 is pressed against the rear surface of the cleaning tank 2 and moved upward from below. Specifically, the upper end portion of the second water channel 46 is inserted into the turbidity detection water channel 47 to perform rough positioning. Thereafter, the fixed cleaning nozzle 11 is aligned in the left-right direction so that the insertion rib 41 is inserted into the insertion portion 40, and at the same time, the fixed cleaning nozzle side rib 43 is slid from below to the surface of the cleaning tank side rib 44. Positioning of the fixed cleaning nozzle 11 in the front-rear direction is performed. As described above, when the fixed cleaning nozzle 11 is fixed to the inner wall of the cleaning tank 2, not only the second water channel 46 but also the inserted portion 41 and the insertion rib 41, the fixed cleaning nozzle side rib 43 and the cleaning tank side rib 44. Thus, the position of the fixed cleaning nozzle 11 in the left-right direction and the front-rear direction can be regulated, so that the load is not applied to the second water channel 46 made of resin, and the second water channel 46 is bent or bent. Is suppressed. Furthermore, the second water channel 46 can be reliably inserted into the washing water detection water channel 47.

  Here, the cleaning tank side rib 44 not only restricts the position of the resin-made fixed cleaning nozzle 11 in the front-rear direction, but also suppresses warping of the fixed cleaning nozzle 11 due to the application of heat or the like. The load on the second water channel 46 due to the warp of the cleaning nozzle 11 can also be suppressed.

  Next, as shown in FIG. 6B, the lower rear end of the fixed cleaning nozzle 11 is pressed against the rear surface of the cleaning tank 2. Further, as shown in FIG. 6C, the fixed cleaning nozzle 11 is moved slightly downward, the position is determined, and the fixed cleaning nozzle 11 is fixed with screws or the like.

  In this way, the insertion rib 41 is inserted into the inserted portion 40, and the cleaning tank side rib 44 contacts the fixed cleaning nozzle side rib 43, so that the horizontal direction and the front / rear direction of the fixed cleaning nozzle 11 are changed in the cleaning tank 2. It is fixed without shifting. Accordingly, the positions of the first and second water channels 45 and 46 formed in the fixed cleaning nozzle 11 in the cleaning tank 2 are not easily displaced, and the position of the turbidity detecting means 14 provided on the upper surface of the cleaning tank 2 is It becomes difficult to slip.

  Thereby, the fall of the precision by the components dispersion | variation and assembly dispersion | variation which arise on manufacture can be suppressed, and turbidity can be detected accurately. Further, the washing water of the fixed washing nozzle 11 arranged to discharge the washing water upward from the turbidity detection injection port 15 is arranged downward so that the bottom surface faces the turbidity detection injection port 15. The concave turbidity detection water channel 47 is supplied, and the second water channel 47 and the turbidity detection water channel 47 are arranged so as to overlap in the front-rear direction as described above.

  In addition, there is no need to consider the gap relationship between the second water channel 47 and the turbidity detection water channel 47 due to variations in parts and assembly that occur in manufacturing, and stable turbidity detection is realized including variations due to manufacturing. be able to.

  Further, by providing the turbidity detecting means 14 at a position that can be seen from the transparent window provided on the lid (door), the turbidity detecting means 14 is detecting the turbidity during driving by the light of the turbidity detecting means 14. It is possible to inform the user that the cleaning water can be seen from the transparent window 16, and it is possible to give a sense of security that the cleaning water is clean.

  Further, by providing the water dividing means 10, the cleaning water can be ejected in order from the cleaning nozzles 6 a, 6 b, 6 c, 11.

  Turbidity is determined by the cleaning nozzles (cleaning means) 6a, 6b, 6c, 11 when the cleaning object is cleaned, and the dirt that has fallen from the cleaning object is dissolved or mixed in the cleaning water. Which cleaning nozzles (cleaning means) 6a, 6b, 6c, 11 are to be cleaned depending on whether the nozzles (cleaning means) 6a, 6b, 6c, 11 are heavily soiled or change in turbidity Since it is also possible to determine whether the dirt on the object is tight, the cleaning nozzles (cleaning means) 6a, 6b, 6c, 11 that are desired to be used can be efficiently used to perform efficient cleaning according to the dirt or set It is possible to perform effective cleaning depending on the capacity of the object to be cleaned 3 such as tableware.

  Here, the turbidity detecting means 14 is only at one place, but the cleaning water is supplied to all the cleaning nozzles 6a, 6b, 6c, 11 by controlling the rotation speed / time, stop time, etc. of the cleaning pump 9. Since it is possible to supply cleaning water to the turbidity detecting means 14 every time, it is possible to know the supply state of the cleaning water to all the plurality of cleaning nozzles (cleaning means) 6a, 6b, 6c, and 11.

Therefore, the detection means 14 can determine which cleaning nozzles 6a, 6b, 6c, 11 are used among the plurality of cleaning nozzles 6a, 6b, 6c, 11, and which cleaning nozzles 6a, 6b, 6c, 11 The degree of dirt can be detected during use, and the position of the washing nozzles 6a, 6b, 6c, and 11 and the dirt can be reliably detected with a single configuration with a simple configuration. Therefore, it is possible to efficiently control the water pressure, cleaning time, etc. of each cleaning nozzle 6a, 6b, 6c, 11 to be used for efficient cleaning according to dirt, or to be cleaned 3 such as tableware to be set. By changing the amount of water used and the operation time, efficient cleaning can be performed. In addition, even if the objects to be cleaned 3 such as tableware are small in quantity, it is possible to determine where the objects to be cleaned 3 such as tableware set are dirty even if they are not limited to a specific place in the tableware basket 4. Since it can be judged, the set position of the article to be cleaned 3 such as tableware is limited and the usability is not deteriorated. In addition, as a means for preventing performance deterioration due to long-term use of the turbidity detecting means 14, water is supplied to the cleaning nozzles 6 a, 6 b, 6 c, 11 having the turbidity detecting means 14 for the purpose of cleaning the turbidity detecting means 14 The cleaning process can be performed.

  Therefore, energy can be concentrated and used in necessary portions, so that efficient cleaning can be performed, and contaminants attached to the object to be cleaned 3 such as tableware can be cleaned in a short time. Efficient cleaning can be realized.

  As described above, the dishwasher of the present invention can suppress contamination of the turbidity detecting means and suppress the occurrence of turbidity detection error, so that the tabletop type, built-in type, and commercial dishwasher, etc. Useful as.

DESCRIPTION OF SYMBOLS 1 Main body 2 Washing tank 3 Object to be cleaned 4 Tableware basket 5 Storage part 6 Washing means 7 Washing water circulation path 8 Vegetable filter 9 Washing pump 10 Dividing means 11 Fixed washing nozzle 12 Light emitting part 13 Light receiving part 14 Turbidity detecting means 15 Turbidity 40 for detecting degree of insertion 40 Inserted part 41 Insertion rib (position restricting part)
42 Detection Unit 43 Fixed Cleaning Nozzle Side Rib 44 Cleaning Tank Side Rib (Position Restriction Unit)
45 1st water channel 46 2nd water channel 47 Turbidity detection water channel

Claims (2)

A dishwasher that sprays washing water to wash an object to be cleaned,
A storage tank for storing cleaning water, and a cleaning tank for storing an object to be cleaned;
A fixed cleaning nozzle fixed to the rear surface of the inner wall of the cleaning tank;
A cleaning pump for pumping cleaning water to the fixed cleaning nozzle;
With
A first water channel extending forward from the fixed cleaning nozzle;
A second water channel that is bent upward from the first water channel;
Turbidity detecting means provided on the upper surface of the inner wall of the cleaning tank and detecting information on the turbidity of the cleaning water supplied from the second water channel;
The turbidity detecting means is provided with a turbidity detecting water channel having a lower end provided below the upper end of the second water channel. The dishwasher according to claim 1, wherein a position restricting portion for fixing the fixed washing nozzle to a predetermined position of the washing tank is provided in the washing tank.

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